Siegfried container handling

[ross-spencer]

Currently, we can only identify container objects and objects inside containers using PUID and soon, tar#filename style patterns, but if Siegfried uses another identifier to choose to extract a file from a container then it means this must be modeled to be a useful statistic.

Siegfried container identifiers are configured in its configuration package, e.g.

• PRONOM
• MIMEInfo
• Wikidata

And then used by decompress to enable Siegfried to identify objects to decompress, e.g. for ZIP:

• ZIP type enum.

We need to include the other IDs in the SFYAMLHandler.